What is Diffusion _ It’s Meaning and Definition Diffusion is the net passive movement
What is Diffusion _ It’s Meaning and Definition Diffusion is the net passive movement.
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What is Diffusion? — Meaning and Definition
Diffusion is a fundamental concept in physics, chemistry, and biology, and it refers to the movement of particles from an area of higher concentration to an area of lower concentration.
Definition:
Diffusion is the net passive movement of molecules or particles from a region where they are in higher concentration to a region of lower concentration, until equilibrium is reached.
It occurs without the need for energy input, making it a passive transport process.
Examples of Diffusion:
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Perfume spreading in a room – The scent molecules spread from where the perfume was sprayed to the rest of the air.
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Oxygen entering blood in lungs – Oxygen diffuses from the alveoli (high concentration) into the blood (low concentration).
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Sugar in water – When sugar is added to water, it slowly spreads out without stirring.
In Biology:
Diffusion helps in:
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Gas exchange (O₂ and CO₂ in lungs and tissues)
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Transport of nutrients in cells
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Waste removal
Key Features:
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Passive process (no energy required)
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Driven by the concentration gradient
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Continues until dynamic equilibrium is reached
Would you like a visual diagram or the differences between diffusion and osmosis?
